<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>main蓝图</title>
</head>
<body>
    <!-- html + tab 快速生成html结构代码 -->
    <h2>main蓝图</h2>
</body>
</html>

